My son struggles with math and was not doing well with another PreAlgebra curriculum. He started Derek Owens PreAlgebra in January and will finish the first semester next week. I thought it would take until the end of summer to complete the curriculum, but my son is flying through it and not complaining at all. They have a workbook of notes and practice problems the student completes while watching the videos. After each section, the student completes a one page assignment, and then there is a chapter test. The assignments and tests are graded by DO's staff, but I have heard they will give you a discount if you want to grade them yourself. I'm not letting my son skip anything because I think he needs the review before starting Algebra. You could skip some of the material your daughter already knows by having her take the chapter test before starting each chapter. Then, if she does well on the test, you could let her skip the chapter. I would email DO and see what he advises. We have been really happy with the course.